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Finding the Fourth Proportional to 245,438.40, 368,503.20 and 192,907.20

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Solution

The fourth proportional to 245,438.40, 368,503.20 and 192,907.20 is: 289,632.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,438.40 : 368,503.20 = 192,907.20 : x
  2. Step 2: Convert to fraction form
    245,438.40/368,503.20 = 192,907.20/x
  3. Step 3: Cross multiply
    245,438.40x = 368,503.20 × 192,907.20
  4. Step 4: Simplify right side
    245,438.40x = 71,086,920,503.04
  5. Step 5: Solve for x
    x = 71,086,920,503.04/245,438.40
  6. Step 6: Final answer
    x = 289,632.43

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.